diff --git a/common/config.go b/common/config.go
index 971c4c1..74e0660 100644
--- a/common/config.go
+++ b/common/config.go
@@ -22,8 +22,12 @@
 	"runtime"
 	"strings"
 	"sync"
+
+	"github.com/google/blueprint/proptools"
 )
 
+var Bool = proptools.Bool
+
 // The configuration file name
 const configFileName = "soong.config"
 const productVariablesFileName = "soong.variables"
@@ -287,3 +291,7 @@
 func (c *config) DefaultAppCertificate(ctx PathContext) SourcePath {
 	return c.DefaultAppCertificateDir(ctx).Join(ctx, "testkey")
 }
+
+func (c *config) AllowMissingDependencies() bool {
+	return Bool(c.ProductVariables.Unbundled_build)
+}